| The 21st century is the century of the ocean,the development of blue economy,the construction of marine power.In recent years,due to excessive fishing,sewage discharge,causing damage to the sea,loss of habitat destruction of marine life,red tide and other disasters.These all seriously affected the sustainable development of the ocean.Therefore,the marine ranching as a new type of marine fishery production,with the restoration of the ecological environment,the role of improving water quality.Wuzhizhou Island Marine Ranching as Chinese first tropical marine ranching,can effectively repair the ecological environment,but its ultimate goal is to develop tourism.Ocean pasture tourism is the key development project of Sanya City marine tourism,Wuzhizhou Island marine ranching has formed a certain scale,formed a good biosphere,carried out diving,submarine sightseeing,fishing and other tourism services.The ecological environment is an tourist resource to tourists,so it has more important practical significance to analyze and evaluate the ecological environment of marine ranch tourism area.Based on the Landsat-5 TM images on June 1st 2010 and the GF-1 WFV2 images on June 1st 2014 as the basis of remote sensing data,the correlation between the bands and the concentrations of chlorophyll-a and suspended substance was analyzed by combining the data of sea area sites,respectively construct the inversion models of the concentration of chlorophyll-a and suspended substance in Wuzhizhou Island marine ranch tourist area.Secondly,the distribution of chlorophyll-a and suspended substance concentration was obtained by using ENVI 5.3 and ArcGIS 10.3,and the change of concentration was analyzed from the aspects of time and space.At the same time,calculate the biodiversity,evenness and zooplankton of phytoplankton.The changes in the biological environment of the Wuzhizhou Island marine ranch tourism area from 2010 to 2014 were analyzed.Finally,it analyzes the relationship between marine ranching tourism and ecological environment.Get the following results.(1)From 2010 to 2014,From 2010 to 2014,the concentration of chlorophyll-a in Wuzhizhou Island marine ranch tourism area increased significantly,especially in the south and southeast.The concentration of chlorophyll-a in the study area was less than 2 mg/m3,and the low concentration indicated that the water quality was clear and became a major attraction for tourism.(2)From 2010 to 2014,the concentration of suspended matter in Wuzhizhou Island marine ranch tourism area increased,and the distribution changed greatly.97%of the regional suspended matter concentration is less than 10 mg/L.With the development of marine tourism project,suspended substance concentration increased dramatically.In the north and northwest of Wuzhizhou Island beach area,the concentration of suspended solids affected by tourism activities is high,affecting the quality of tourism.(3)From 2010 to 2014,the species and quantity of phytoplankton and zooplankton Wuzhizhou Island marine ranch tourist area increased.The phytoplankton species grew from 39 to 58,and the diversity index rose from 1.27 to 2.32,and the zooplankton biomass increased 3.5 times over the four years.It can be seen that the biological environment of the study area has been improved,which is beneficial to the development of marine ranching tourism projects such as sea fishing and diving sightseeing.(3)There is a mutual influence between Wuzhizhou Island marine ranching tourism and ecological environment,tourism can not only promote environmental protection and stress the ecological environment,the ecological environment can restrict tourism development and enhance the tourism attracted.In the future research,we should expand the ecological environment evaluation factors,optimize the evaluation accuracy,and provide scientific basis for tropical oceans tourism development and ecological environment protection to realize the sustainable development of marine ranch tourism. |
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